<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>caseThree</title>
</head>
<style>
  /*去除页面的默认间隔(去除页面的内外边距)*/
  *{
    margin: 0;
    padding: 0;
  }
  .one{
    margin: 0 auto;
    width: 1226px;
    height: 614px;
    background-color: deepskyblue;
  }
  .two{
    float: left;
    width: 234px;
    height: 614px;
    background-color: orange;
  }
  .three{
    float: right;
    width: 978px;
    height: 614px;
    background-color: pink;
  }

  ul{
    list-style: none; /*将li前面的符号去掉*/
  }

  .three  li{
    float: left;
    margin-right: 14px;
    margin-bottom: 14px;
    width: 234px;
    height: 300px;
    background-color: green;
  }
  .three li:nth-child(4n){
    margin-right: 0;
  }


</style>
<body>
<div class="one">
  <div class="two"></div>
  <div class="three">
    <ul>
      <li></li>
      <li></li>
      <li></li>
      <li></li>
      <li></li>
      <li></li>
      <li></li>
      <li></li>
    </ul>
  </div>

</div>

</body>
</html>
